Gmail has always had a number of cool themes for you to choose from, but they've finally added the ability to create your own, letting you customize your inbox even further.

Creating a theme is super easy: just go to Settings > Themes and under Custom, choose a light or dark theme. Then, upload an image from Gogole+ or your hard drive to set it as the background for your inbox. If you don't have a photo in mind, you can also browse or search Google's featured photos to find one you like. We're not seeing the feature in our inboxes just yet, so they're probably rolling it out gradually. If you don't see it, check back later. In the meantime, see the video above for a demonstration of the new feature.